Nut and bolt lock.



H. HVWALTON & P. GOTWALT,

NUT AND BOLT LOQK.

AAJPlLIOA'lIOl FILED 00T. 15, 1912.

1,083,471 u v Patented-Jan. 6, 1911-4.

Attorneys entran sfraans '.:rfnran'r carica.

HARRY H. WALTON AND PAUL GOTWALT, IE HARRISBURG, PENNSYLVANIA.

NUT AND BOLT LOCK. p

Specification of Letters Patent.

Patented Jan. 6, 1914.

Application led October 15, 1912. SerialiNo. 725,865.

vide a nut lock comprising nested Washers,

so constructed that moisture may fmd its way into the nut lock, to effect a rustlng together of the parts.

With the foregoing and other objects 1n view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and 1n the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the 'invention can be made Within the s/cope of what is claimed without departing from the spirit of the invention.

'In the drawing Figure 1 is a side elevation; Fig. 2 is a transverse section; Fig. 3 is a perspective of the secondary washer; Fig. 4 is a perspective of the primary washer; Fig. 5 is a bottom plan of the primary washer; and Fig. 6 is a top plan of the secondary washer.

ln the accompanying drawing, the numeral 1 indicates a bolt, the same being threaded as indicated at 2, to receive a nut 3. The material through which the bolt 1 passes is indicated by the reference character 4.

The invention further includes a primary washer, disposed about the bolt l. The under face of the primary washer 5 is ribbed, or otherwise roughened as indicated at 6, for engagement with one face of the material 4.

The washer 5 is provided with a conical recess 7, the slant wall of which may be ribbed or otherwise roughened, as indicated at 8.

Fitting in the recess 7 of the washer 5 is a resilient secondary washer 9, the outer end face of which is ribbed or roughened as indicated at 10, for engagement with the nut 3. The secondary washer 9 is ldivided as indicated at 11. The bores 12 and 14 of the washers 5 and 9 respectively, are of cylindrical form, and serve to receive the bolt 1.

vln practical operation, the parts are positioned as shown in Figs. l and 2, saving for the fact that before the nut 3 is rotated into firm engagement with the secondary Washer 9, the washer 9 will upst-and slightly above the outer face of the primary washer 5. When the nut 3 is rotated to a rm seat against the secondary washer 9, the washer 9, beingresilient, will be crowded into the recess 7 of the washer 5. The ribbed face 8 of the recess 7 will prevent rotation between the washers 5 and 9, the ribbed face 6 of the primary washer 5 preventing relative rotatory movement between the washer 5 and the material 4. Since the outer end face of the secondary washer 9 is ribbed or roughened as indicated at 10, this face 10, engaging the nut 3, will -serve to hold the nut 3 against rotation upon the bolt 1.

It is to be observed, referring particularly to Fig. 2, that the nut 3 is of less diameter than the wider end face of the secondary ywasher 9. Consequently, one end of the slot 11 in the washer 9, will project beyond the periphery of the nut 3. Recalling the ,fore going, and referring to Fig. 2, it will be seen that moisture may find its way readily into the recess 1l, beyond the periphery of the nut 3, the moisture ultimately owing materially between the primary washer 5 and the material 4, the ribbed or roughened form given to the end face of the washer 5, as indicated at 6, permitting moisture to :find its way between the washer 5 and the material 4. Consequently, the members 4 and 5, particularly when the member 4 is fashioned from metal, will become rusted together, and

relative rotation between these parts will thereby be prevented. Further, moisture finding its way into the recess 11 of the secondary washer 9 will find its waybetween the slant face of the washer 9 and the wall of the recess 7 in the primary washer 5, so

that these washers will rust together.

, bf the bolt and nut structure; the inner,

material engaging end face of the primary :1s our own, we have hereto :tiixed our sig- Washer being roughened to afford u grip alld 11n-tures in the presence of two witnesses.

to permit moisture entering the opening eyond the periphery of the rotatable element v HARRY H' WALTON of the bolt and nut structure, to pass between. y PAUL GOTWALT said end face of the primary washer and the Witnesses:

material. HORACE K. OSMAN, In testimony that We claim the foregoing q H. K. DELLINGER. 

